body {
    margin: 0;
    padding: 0;
    font-family: 'Helvetica', 'Tahoma', Arial, sans-serif;
    height: 100vh;
    background-image: url('../images/welcome-background.jpg'); /* 替换为您的背景图片路径 */
    background-size: cover;
    background-position: center;
    display: flex;
    justify-content: center;
    align-items: center;
    position: relative;
}

body::before {
    background-color: rgba(0, 0, 0, 0.4); /* 半透明黑色遮罩层 */
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    z-index: -1;
}

#Content {
    background: rgba(255, 255, 255, 0.2); /* 半透明白色背景 */
    border-radius: 15px;
    padding: 40px 60px;
    text-align: center;
    backdrop-filter: blur(8px); /* 模糊背景 */
    box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
    max-width: 400px;
    width: 80%;
    color: #444;
    overflow: hidden;
    position: relative;
    transition: all 0.3s ease; /* 添加过渡效果 */
}

#Content::before {
    content: '';
    position: absolute;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-image: inherit; /* 使用与背景相同的图片 */
    background-size: cover;
    background-position: center;
    filter: brightness(100%); /* 初始亮度为100% */
    border-radius: 15px;
    z-index: -2;
    transition: filter 0.3s ease; /* 添加背景暗化的过渡效果 */
}

#Content:hover::before {
    filter: brightness(50%); /* 悬浮时将背景变暗 */
}

#Content:hover {
    transform: scale(1.05); /* 增加尺寸，放大卡片 */
}


h2 {
    font-size: 2.5em;
    color: #d1a700; /* 低饱和度的绿色 */
    margin-bottom: 20px;
    transition: opacity 0.3s ease;
}

p {
    color: #d1a700;
}

a {
    font-size: 1.5em;
    text-decoration: none;
    padding: 12px 24px;
    border-radius: 5px;
    transition: all 0.3s ease;
    opacity: 0; /* 初始时隐藏超链接 */
    color: #d1a700; /* 初始颜色为黄色 */
}

a:hover {
    background-color: #4d6b38;
    color: #fff;
    border-color: #d1a700; /* 深绿色边框 */

}

sub {
    font-size: 0.9em;
    color: #d1a700; /* 更柔和的灰色 */
    opacity: 0.6;
    margin-top: 20px;
}

#Content:hover a {
    opacity: 1; /* 显示超链接 */
}
